In this example we will cover compare two string in golang. To compare strings we will use the golang compare() function. The string compare() function will take two string arguments as input
syntax
func Compare(a, b string) int
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This function compare two string lexicographically and returns an integer value as 0, 1 and -1
return 0: if both strings are equal
return 1: if the string a > String b
return -1: if the string a < String b
Example 1 : golang compare two strings
package main
import (
"fmt"
"strings"
)
func main() {
fmt.Println(strings.Compare("String compare", "String compare"))
fmt.Println(strings.Compare("A", "a"))
fmt.Println(strings.Compare("BB", "BB"))
}
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output
0
-1
0
Example 2: Compare String with Custom function
package main
import "fmt"
func main() {
s1 := "String compare golang"
s2 := "String compare golang;"
s3 := "ABCDEFGHI"
s4 := "ABCDEFGHI"
fmt.Println(customCompare(s1, s2))
fmt.Println(customCompare(s1, s3))
fmt.Println(customCompare(s2, s3))
fmt.Println(customCompare(s3, s4))
}
type StrCount map[string]int
func customCompare(s1 string, s2 string) bool {
if len(s1) != len(s2) {
return false
}
m1 := make(StrCount)
m2 := make(StrCount)
for i := 0; i < len(s1); i++ {
m1[string(s1[i])]++
m2[string(s2[i])]++
}
return compareMap(m1, m2)
}
func compareMap(m1 StrCount, m2 StrCount) bool {
if len(m1) != len(m2) {
return false
}
for k, _ := range m1 {
if m1[k] != m2[k] {
return false
}
}
return true
}
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Output
false
false
false
true
Related:
How to split string in golang example
Tags: Golang tutorial, Compare two strings,
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